Comment by anigbrowl

Moral dilemmas are easy to solve if you have perfect information. In the train-track problem you reference, the utility of saving 10 people at the expense of 1 life is obvious and I would do so without hesitation (though not without regret). But life rarely presents us with cases where the utilitarian calculus is so clear; our powers of foresight and analysis are so limited that we get better results by establishing and promulgating rules that cover the most common situations - imperfectly, but with tolerably low error levels.